Building elevation measurement method based on PSInSAR technology

Abstract

The invention discloses a building elevation measurement method based on a PSInSAR technology. The method specifically comprises the steps of S1 based on data of multiple high-resolution SAR images ofa target city, generating an InSAR big database through a permanent scatterer synthetic aperture radar interferometry technology, and obtaining PS point three-dimensional space position information of the target city; S2 introducing a statistical theory and a signal estimation method, and performing spatial grading twice estimation based on three-dimensional spatial positions of all PS point datain a target range to obtain urban ground elevation; S3 introducing a building vector box, selecting PS points in each building, clustering the PS point elevations in the building, removing wrong points, and calculating the roof elevation ; and S4 obtaining the height of the building by subtracting the ground PS point elevation from the roof PS point elevation. Data acquisition is not limited by the airspace; related data can be obtained in a large range; the automation degree is high; and the elevation of the urban house building can be quickly estimated.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar interferometry, in particular to a method for measuring building elevation based on PSInSAR technology. Background technique [0002] With the promotion of the concept of smart city, urban quantification and urban digitalization are more and more favored by city managers. Among them, the white film of urban buildings has a certain market value as its base map. The white film of urban buildings is mainly composed of building vectors and building elevations. Large-scale building vector frames can be obtained on optical satellite basemaps; while large-scale urban building elevations are relatively complicated to obtain, generally through Lidar technology, and Lidar accuracy is relatively high. High, but corresponding to the high cost, and the main carrier of Lidar is drones and aircraft platforms. At present, most cities in China are banned from flying, and there are certain regulato...

AI Technical Summary

Problems solved by technology

The white film of urban buildings is mainly composed of building vectors and building elevations. Large-scale building vector frames can be obtained on optical satellite basemaps; while large-scale urban building elevations are relatively complicated to obtain, generally through Lidar technology, and Lidar accuracy is relatively high. High, but corresponding to the high cost, and the main carrier of Lidar is drones and aircraft platforms. At present, most cities in China are banned from flying, and there are certain regulatory restrictions

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